CN113765585B - Method and system for establishing communication link - Google Patents
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- CN113765585B CN113765585B CN202010501002.4A CN202010501002A CN113765585B CN 113765585 B CN113765585 B CN 113765585B CN 202010501002 A CN202010501002 A CN 202010501002A CN 113765585 B CN113765585 B CN 113765585B
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- 238000004891 communication Methods 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000003287 optical effect Effects 0.000 claims abstract description 43
- 230000005281 excited state Effects 0.000 claims abstract description 7
- 238000012795 verification Methods 0.000 claims description 36
- 230000004044 response Effects 0.000 claims description 18
- 238000001228 spectrum Methods 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 claims description 7
- 230000003595 spectral effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 description 10
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- 229940056932 lead sulfide Drugs 0.000 description 1
- 229910052981 lead sulfide Inorganic materials 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/112—Line-of-sight transmission over an extended range
- H04B10/1129—Arrangements for outdoor wireless networking of information
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06037—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking multi-dimensional coding
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06046—Constructional details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/1149—Arrangements for indoor wireless networking of information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
Abstract
The application provides a method and a system for establishing a communication link, wherein the method comprises the following steps: s101, emitting laser to a light dimension code carrier attached to a target object through a laser emitting unit, wherein light dimension code information borne by the light dimension code carrier comprises link configuration information; s102, collecting fluorescence emitted by the optical dimension code carrier in an excited state; s103, decoding the fluorescence to obtain link configuration information; s104, establishing a physical layer or data link layer communication link with the target object or the network access point according to the link configuration information. According to the scheme, the optical code carrier attached to the target object is actively irradiated by laser to generate fluorescence carrying link configuration information, and a communication link is established with the target object or a network access point according to the link configuration information contained in the fluorescence.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and a system for establishing a communication link.
Background
The internet of things is a huge network formed by combining various information sensing devices with the internet, and all articles in a physical network are accessed into the network through the information sensing devices, and are received, identified and managed. The realization of the Internet of things can be divided into 4 links of identification, perception, processing and information transmission, and the key technology spans multiple fields of wireless communication, computer technology, coding control, information sensing, information identification and processing and the like.
The invention and the wide application of the two-dimensional code technology lead the Internet of things to be rapidly developed and widely applied. The two-dimensional code has the characteristics of high coding density, large information capacity, wide coding range, low cost and the like, and the two-dimensional code can be widely applied to the fields of logistics, identity recognition, quick data input and the like in the modes of printing, photographing, network transmission and the like.
However, the physical nature of the identity information recognition technology based on the two-dimensional code belongs to image feature analysis comparison after optical imaging is carried out on the appearance of the object, and the physical nature determines that the recognition process can be carried out on stationary or slow moving objects under the conditions of illumination and close distance, so that the long-distance, especially the identity information recognition of the fast moving objects can not be realized, the application of a physical network in the wider social field is greatly limited, the identity recognition of the objects under the condition of no illumination is realized, the identity information recognition of the long-distance fast moving vehicles and unmanned aerial vehicles and the like can not be realized, and the object access to the Internet of things is limited.
Disclosure of Invention
The present application is directed to a method and system for establishing a communication link, so as to solve at least one problem in the prior art in network access.
A first aspect of the present application provides a method of establishing a communication link, comprising:
s1, emitting laser to a light dimension code carrier attached to a target object through a laser emitting unit, wherein light dimension code information borne by the light dimension code carrier comprises link configuration information;
s2, collecting fluorescence emitted by the optical dimension code carrier in an excited state;
s3, decoding the fluorescence to obtain link configuration information;
and S4, establishing a physical layer or data link layer communication link with the target object or the network access point according to the link configuration information.
According to one embodiment of the present application, before the step S1, the method further includes a step S0:
s0, coding laser used for exciting fluorescence emitted by the light dimension code carrier according to preset coding information so as to obtain coded laser.
According to one embodiment of the present application, the step S3 specifically includes:
identifying spectral information of the fluorescence;
and decoding the spectrum information to obtain link configuration information.
According to one embodiment of the present application, the link configuration information is at least one of a communication channel, a communication slot, and a MAC address.
According to one embodiment of the present application, after the step S4, the method further includes:
sending a verification request to a target object or a network access point, wherein the verification request comprises identity information of a device to be accessed and/or the preset coding information;
and receiving a returned verification response, if the verification is passed, normally performing communication, and if the verification is not passed, returning to the step S0 to perform laser coding again.
According to one embodiment of the application, the optical code carrier is in a moving state relative to the laser emitting unit, or the distance between the optical code carrier and the laser emitting unit is not smaller than a preset threshold.
According to one embodiment of the present application, the step S4 specifically includes:
sending a communication link request to a target object or a network access point according to the link configuration information;
and receiving a communication link response returned by the target object or the network access point, and establishing a communication link according to the response.
A second aspect of the present application provides a system for establishing a communication link, comprising:
the laser emission unit is used for emitting laser to the optical dimension code carrier attached to the target object, and the optical dimension code information carried by the optical dimension code carrier comprises link configuration information;
the collecting unit is used for collecting fluorescence emitted by the optical dimension code carrier in an excited state;
the decoding unit is used for decoding the fluorescence to obtain link configuration information;
and the access unit is used for establishing a physical layer or data link layer communication link with the target object or the network access point according to the link configuration information.
According to one embodiment of the present application, the system further comprises:
the coding unit is used for coding the laser used for exciting the light dimension code carrier to emit fluorescence according to preset coding information before the laser emitting unit emits the laser to the light dimension code carrier so as to obtain coded laser.
According to one embodiment of the present application, the decoding unit is specifically configured to:
identifying spectral information of the fluorescence;
and decoding the spectrum information to obtain link configuration information.
According to one embodiment of the present application, the link configuration information is at least one of a communication channel, a communication slot, and a MAC address.
According to one embodiment of the present application, the system further comprises:
the verification unit is used for sending a verification request to the target object or the network access point after the access unit establishes a communication link with the target object or the network access point according to the link configuration information, wherein the verification request comprises the identity information of the device to be accessed and/or the preset coding information; and receiving a returned verification response, if the verification is passed, normally performing communication, and if the verification is not passed, enabling the coding unit to perform laser coding again.
According to one embodiment of the application, the optical code carrier is in a moving state relative to the laser emitting unit, or the distance between the optical code carrier and the laser emitting unit is not smaller than a preset threshold.
According to one embodiment of the present application, the access unit is specifically configured to:
sending a communication link request to a target object or a network access point according to the link configuration information;
and receiving a communication link response returned by the target object or the network access point, and establishing a communication link according to the response.
Compared with the prior art, the method and the system for establishing the communication link provided by the application actively irradiate the optical code carrier attached to the target object through the laser to generate fluorescence carrying the link configuration information, and establish the communication link with the target object or the network access point according to the link configuration information contained in the fluorescence.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic diagram of a fluorescence spectrum encoding method according to an embodiment of the present disclosure;
FIG. 2 illustrates a flow chart of a method of establishing a communication link provided by an embodiment of the present application;
fig. 3A illustrates a flowchart for establishing a communication link with a network access point provided by an embodiment of the present application;
FIG. 3B illustrates a flow chart for establishing a communication link with a target object provided by an embodiment of the present application;
FIG. 4A illustrates a block diagram of a system for establishing a communication link provided by an embodiment of the present application;
fig. 4B illustrates a block diagram of another system for establishing a communication link according to an embodiment of the present application.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.
In addition, the terms "first" and "second" etc. are used to distinguish different objects and are not used to describe a particular order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
The embodiment of the application provides a method and a system for establishing a communication link, which are based on the communication link of a light-dimensional code, so that the distance for establishing the communication link is greatly increased, and the communication link in a high-speed state can be realized. The following description refers to the accompanying drawings.
The optical dimension code is a novel information carrier, which is characterized in that a marker (typically a film or a coating) made of a semiconductor nano crystal quantum dot material is attached to the surface of an article to be coded (or marked), the markers generate specific fluorescence spectrum information under the irradiation of laser, the characteristic information is coded by fusing different components and different nano scales of the quantum dot material, and the physical identity of the article can be quickly and efficiently identified by reading the fluorescence spectrum information of the article under the irradiation of the laser, so that specific application based on the identity of the article can be developed.
Two representative coding schemes are shown below:
quantum dot materials with different nanometer granularities are sprayed on the same plane on the surface of an article in a crossing way, so that the spectrum is coded in the wavelength dimension, four PbS (lead sulfide) quantum dot materials with different granularities are sprayed on the surface of the article to be identified in the longitudinal and transverse directions respectively, and the PbS quantum dot materials are excited respectively under the irradiation of laser with the same wavelengthSend out lambda 1 、λ 2 、λ 3 、λ 4 The presence or absence of fluorescence of four wavelengths, each of which excites the presence or absence of fluorescence of a wavelength, may represent the numbers 0 and 1, respectively, under which condition the encoded information of the object surface is 1111.
If one of the granularity quantum dot materials is reduced, the excitation wavelength becomes 3, and then the coded information of the object surface is 1101, and so on.
Besides, the quantum dot material can be prepared into a film, the film thickness is small, the quantum dot film material can be prepared into a near transparent material, the quantum dot film materials with different scales are overlapped together to realize rich codes, and the codes of the quantum dot film materials with 4 scales are shown in fig. 1, so that the 4-bit 0 and 1 coding information can be realized.
Fig. 2 is a flowchart of a method for establishing a communication link according to an embodiment of the present application, where the method may be applied to a system for establishing a communication link, for example, a mobile phone, a tablet computer, a smart wearable device, etc., and includes the following steps:
step S101: and transmitting laser to a light dimension code carrier attached to the target object through a laser transmitting unit, wherein light dimension code information borne by the light dimension code carrier comprises link configuration information.
Step S102: and collecting fluorescence emitted by the optical dimension code carrier in an excited state.
Step S103: and decoding the fluorescence to obtain link configuration information.
Wherein, the link configuration information can be at least one of a communication channel, a communication time slot and a MAC address.
Step S104: and establishing a physical layer or data link layer communication link with the target object or the network access point according to the link configuration information.
For example, the link configuration information is a communication channel or a communication time slot, the communication channel or the communication time slot corresponding to the link configuration information is identified, and the communication link with the target object or the network access point is directly established according to the communication channel or the communication time slot.
For another example, the link configuration information is a MAC address, and the communication link of the communication device corresponding to the MAC address is directly established according to the MAC address.
In practical application, step S104 may be implemented as follows:
step S104a: and sending a communication link request to the target object or the network access point according to the link configuration information.
Step S104b: and receiving a communication link response returned by the target object or the network access point, and establishing a communication link according to the response.
According to some embodiments of the present application, before the step S101, the method further includes:
step S201: and coding the laser for exciting the light dimension code carrier to emit fluorescence according to preset coding information so as to obtain coded laser. For example, the wavelength, time sequence, duration and the like of the laser emission are coded, and the optical dimension code carrier is excited by the coded laser, so that the same optical dimension code carrier can carry different optical dimension code information.
According to some embodiments of the present application, the step S103 may be implemented as: and identifying the spectrum information of the fluorescence, and decoding the spectrum information to obtain the link configuration information. In this embodiment, besides the link configuration information related to the spectrum information, the link configuration information may be related to other information of fluorescence, which is not limited in this application.
According to some embodiments of the present application, after the step S104, the method further includes:
step S105a: sending a verification request to a target object or a network access point, wherein the verification request comprises identity information of a device to be accessed and/or the preset coding information;
step S105b: and receiving verification response returned by the target object or the network access point, if the verification is passed, normally performing communication, and if the verification is not passed, returning to the step S201 to perform laser coding again, and then performing identity verification according to the new coded laser. For example, after the mobile phone is accessed to the communication network, the identity of the mobile phone is verified, if the verification is passed, the communication is allowed to be normally performed, and if the verification is not passed, the communication is not allowed.
In practical applications, after the system for establishing a communication link completes authentication with the network access point, the system may send a message to the network access point, which may broadcast the message to the communication network.
According to some embodiments of the present application, the optical code carrier is in a moving state with respect to the laser emitting unit, for example, a moving speed is not less than 0.5 m/s. That is, the object on which the optical code carrier is loaded and the system for scanning the optical code carrier can move relatively, and since the laser can accurately excite the optical code carrier and obtain corresponding fluorescence information in the long-distance and high-speed moving state, the above embodiments of the present application are suitable for point-to-point communication links in the high-speed moving and long-distance scenes. For example, a point-to-point connection between vehicles on a highway, where one vehicle is posted or painted with a light-dimensional code carrier, and other vehicles can quickly and accurately establish a communication link with the vehicle through the light-dimensional code carrier in the event of relatively high speed movement.
Thus, according to some embodiments of the present application, the distance between the optical code carrier and the laser emitting unit may be not less than a preset threshold value, which may be set according to the use scenario, for example, not less than 1 meter.
To further illustrate the process of establishing a communication link with a target object or a network access point in the present application, the embodiment of the present application provides a flowchart of establishing a communication link with a network access point as shown in fig. 3A, and a flowchart of establishing a communication link with a target object as shown in fig. 3B, for reference.
According to the method for establishing the communication link, the optical code carrier attached to the target object is actively irradiated by the laser, fluorescence carrying link configuration information is generated, and the physical layer or the data link layer communication link is established with the target object or the network access point according to the link configuration information contained in the fluorescence.
Referring to fig. 4A and 4B, as shown in the drawings, a system 10 for establishing a communication link according to an embodiment of the present application includes:
a laser emitting unit 101, configured to emit laser light to a light dimension code carrier attached to a target object, where light dimension code information carried by the light dimension code carrier includes link configuration information;
the acquisition unit 102 is used for acquiring fluorescence emitted by the optical code carrier in an excited state;
a decoding unit 103, configured to decode the fluorescence to obtain link configuration information;
an access unit 104, configured to establish a physical layer or data link layer communication link with a target object or a network access point according to the link configuration information.
The laser emitting unit 101 can emit laser pulses with different wavelengths, the laser is aimed at the optical code carrier to irradiate through the aiming system, the optical code carrier emits fluorescent signals of specific information under the laser irradiation, the receiving optical system of the collecting unit 102 receives the fluorescent signals emitted by the laser, the collected fluorescent signals are transmitted to the decoding unit 103 to analyze and process the collected information, link configuration information is obtained, and the access unit 104 establishes a point-to-point communication link with the communication module in the target object according to the link configuration information.
According to one embodiment of the present application, the system further comprises:
the encoding unit 201 is configured to encode laser light for exciting fluorescence emitted from the optical code carrier according to preset encoding information before the laser light emitting unit emits the laser light to the optical code carrier, so as to obtain encoded laser light.
According to one embodiment of the present application, the decoding unit 103 is specifically configured to:
identifying spectral information of the fluorescence;
and decoding the spectrum information to obtain link configuration information.
It can be seen that, unlike the manner of establishing a communication link after reading, encoding, decoding information of an article such as an image, a video, a radio frequency, etc., the present application provides a technical manner of establishing a communication link after reading, encoding, decoding based on spectral information, particularly wavelength as an information carrier, enriches the manner of establishing a point-to-point connection, and expands the application range and application scenario of the internet, particularly the future application range of the internet of things.
According to one embodiment of the present application, the link configuration information is at least one of a communication channel, a communication slot, and a MAC address.
According to one embodiment of the present application, the access unit 104 is specifically configured to:
sending a communication link request to a target object or a network access point according to the link configuration information;
and receiving a communication link response returned by the target object or the network access point, and establishing a communication link according to the response.
In accordance with one embodiment of the present application, the system 10 further comprises:
the verification unit is used for sending a verification request to the target object or the network access point after the access unit establishes a communication link with the target object or the network access point according to the link configuration information, wherein the verification request comprises the identity information of the device to be accessed and/or the preset coding information; and receiving a returned verification response, if the verification is passed, normally performing communication, and if the verification is not passed, enabling the coding unit to perform laser coding again.
According to one embodiment of the application, the optical code carrier is in motion relative to the laser emitting unit. For example, the movement speed of the optical code carrier relative to the laser emitting unit is greater than or equal to a preset speed threshold, for example, not less than 0.5 m/s.
According to one embodiment of the application, the distance between the optical code carrier and the laser emitting unit is not smaller than a preset threshold value, for example not smaller than 1 meter.
Of course, the system may also include a processor and memory in which a computer program is stored that can run on the processor. The memory may include a high-speed random access memory (RAM: random Access Memory), and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; but may also be a Digital Signal Processor (DSP), application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.
Compared with the prior art, the system provided by the embodiment establishes the communication link based on the optical code, greatly improves the distance for establishing the communication link and can establish the communication link between the points in a high-speed state.
It is noted that the flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description.
Claims (4)
1. A method of establishing a communication link, comprising:
s0, coding the emission wavelength of laser used for exciting fluorescence emitted by the light dimension code carrier according to preset coding information so as to obtain coded laser;
s1, emitting laser to a light dimension code carrier attached to a target object through a laser emitting unit, wherein light dimension code information borne by the light dimension code carrier comprises link configuration information; the optical dimension code carrier is in a motion state relative to the laser emission unit and the relative motion speed is not less than 0.5 m/s, or the distance between the optical dimension code carrier and the laser emission unit is not less than a preset threshold value and the preset threshold value is not less than 1 m;
s2, collecting fluorescence emitted by the optical dimension code carrier in an excited state;
s3, identifying the spectral information of the fluorescence; decoding the spectrum information to obtain link configuration information; the link configuration information is at least one of a communication channel, a communication time slot and a MAC address;
s4, establishing a physical layer or data link layer communication link with a target object or a network access point according to the link configuration information;
after the step S4, the method further includes:
sending a verification request to a target object or a network access point, wherein the verification request comprises identity information of a device to be accessed and the preset coding information;
and receiving a returned verification response, if the verification is passed, normally performing communication, and if the verification is not passed, returning to the step S0 to perform laser coding again.
2. The method for establishing a communication link according to claim 1, wherein said step S4 is specifically:
sending a communication link request to a target object or a network access point according to the link configuration information;
and receiving a communication link response returned by the target object or the network access point, and establishing a communication link according to the response.
3. A system for establishing a communication link, comprising:
the coding unit is used for coding the emission wavelength of the laser used for exciting the light dimension code carrier to emit fluorescence according to preset coding information before the laser emission unit emits the laser to the light dimension code carrier so as to obtain coded laser;
the laser emission unit is used for emitting laser to the optical dimension code carrier attached to the target object, and the optical dimension code information carried by the optical dimension code carrier comprises link configuration information; the optical dimension code carrier is in a motion state relative to the laser emission unit and the relative motion speed is not less than 0.5 m/s, or the distance between the optical dimension code carrier and the laser emission unit is not less than a preset threshold value and the preset threshold value is not less than 1 m;
the collecting unit is used for collecting fluorescence emitted by the optical dimension code carrier in an excited state;
a decoding unit for identifying spectral information of the fluorescence; decoding the spectrum information to obtain link configuration information; the link configuration information is at least one of a communication channel, a communication time slot and a MAC address;
an access unit, configured to establish a physical layer or data link layer communication link with a target object or a network access point according to the link configuration information;
the verification unit is used for sending a verification request to the target object or the network access point after the access unit establishes a communication link with the target object or the network access point according to the link configuration information, wherein the verification request comprises the identity information of the device to be accessed and the preset coding information; and receiving a returned verification response, if the verification is passed, normally performing communication, and if the verification is not passed, enabling the coding unit to perform laser coding again.
4. A system according to claim 3, characterized in that the access unit is specifically configured to:
sending a communication link request to a target object or a network access point according to the link configuration information;
and receiving a communication link response returned by the target object or the network access point, and establishing a communication link according to the response.
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